Bourn



(No Model.)

W. H. KILBOURN.

STOP MOTION FOR KNITTING MACHINES.

No. 390,375. Patented Oct. Z, 1888.

Qwiimeooey N PETERS, F'hm-lllmgramn Washington, D. C.

iJNiTED STATES ATTNT @rrrea \VASHINGTON H. KILBOURN, OF OLTGAN, NEW YORK.

SPECIFICATION forming part of Letters Application filed October 22, 1: 87.

To aZZ whom it 11mg concern:

Be it known that I, VVASHINGTON H. KIL- BOURN, of Olean, in the county of Cattaraugas and State of New York, have invented certain new and useful Improvements in Stop- Motions for Knitting Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in automatic stop-motions for knitting-machines.

It is important that a knittingmachine should be so constructed that in case the thread should break or have knots therein the machine would therefore stop almost instantaneously.

The object of my present invention is to provide a simple and inexpensive device for attachment to any knitting-machine for accomplishing this result.

With this end in view my invention consists in certain features of construction and combinations of parts, as will be hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is a view in perspective of my improved knittingmachine attachment, showing its position on the machine and all of the immediate cooperating parts of the machine; and Fig. 2 is a detail view of the clutch, hereinafter described.

A represents the bed of the machine; 13, the carriage, of ordinary construction, and having one end of crank-rod C pivoted thereto. The transverse rotary shaft D is the maehineactuating shaft, provided with a loose pulley, E, at one end and an arm, F, at the opposite end rigidly secured to the shaft. This arm has pivoted to it one end of the crank-rod O, and as it turns with the shaft operates to reciprocate the carriage B. Rigidly mounted on the shaft D there is also a sleeve, D, the edge of which, with the adjacent edge of pulley E, forms a clutch, e, and the shaft is fur ther provided near its middle with a pinion, F.

The part G is a thread-guide of ordinary construction, having a spring take-up, H. Loosely depending a little to the rear of the threadholder and in moderately close proximity to the spring take-up is the hanger I. This hanger might be'somewhat varied in form,

Patent No. 390,375, dated October 2, 1888.

Serial-No. 253,084. (No model.)

but preferably consists of a wire bent substantially at right angles, as shown, at the corners a, b, c, and d, suspended loosely from a beam, 1", and having formed near the middle of the limb b an upwardly and inwardly bent pro jection, terminating in a seat or bearing, I).

A bar, K, having a short rack, L, on its under side, is adapted to freely slide or tilt in the upright M at its outer end, and at the opposite end it is provided'with a loop, Z, adapted to be seated on the projection 6 thus holding the bar K normally a little elevated, with the rack L directly above the pinion F. A pin, 7.:, projects laterally from the bar K in position to engage the pivoted upright N. This pivoted upright has a toothed bar, N, pivoted or rigidly secured thereto, the teeth of which engage a projection on the lever O. The lever O is also pivoted to the bed at 0, and its short arm is pivoted to one end of the shifter-bar P. The shifter-bar is provided with elongated slots or similar means, 1), through which pins extend and permit the bar to slide endwise. One end of this bar terminates in a fork, l which is beveled on its coneaved edge and adapted to enter between the hub of pulley E and the sleeve D in disconnecting the parts of the clutch. This mechanism has been our connecting the clutch may be employed.

A depending wire trip, Q, is loosely sus pended at (1 approximately over the projection formed in limb b. This wire is bent substantially as shown, and terminates at one end in eye f, through which the thread passes loosely, and at the other end in a hook, f, which receives the bent projection on limb b.

The operation is simple and is as follows: The thread is passed through eye f, and thence into the guide G and through the string take-up H in the usual manner. Now, when a thread breaks from its very tension, the take-up H flies back and, striking the loosely suspended limb b, forces it and the seat I) back sufiiciently to drop the loop Z, letting the rack L into engagement with pinion F, which, by its continued revolution up to this time, gives the bar K a powerful drive in the direction of the arrow, The pin it impinges against the pivoted upright N, and the teeth of bar N carry the long arm of lever O with it, thereby drivployed; but other equivalent methods for dising the shifter P back forcibly, so that its opposite end enters between the clutch members and separates them. There is nothing now to give the shaft D motion, and hence bar K stops it almost instantaneously with the breaking of the thread. WVhen the thread is knotted, a knot in passing through the eye f forces the hook f in the direction of the arrow, thus removing the seat I) from beneath the loop I), as before, the same operation continuing.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts described with out departing from the spirit and scope of my invention; hence I do not wish to limit myself to the particular construction herein set forth; but,

Having fully described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is

l. The combination, with an actuating-shaft, a pinion mounted thereon, a clutch connected with the shaft, a rack-bar located in close proX- imity to the pinion, and unelutching devices adapted to be operated by the rack-bar, of a hanger suspended above the rack bar and adapted to hold the latter suspended, and a loosely-pivoted trip adapted to disengage the hanger from the rack-bar by the movement of one of its ends, substantially as set forth.

2. The combination, with an actuating-shaft having a pinion, a clutch connected with the shaft, a rack-bar located near the pinion, unclutehing devices adapted to be operated by the rack-bar, and a hanger depending above the bar, of a trip loosely suspended above the bar and having an eye in one end, a hook to engage the hanger at the opposite end, and a spring-thread take-up adapted by its ongagement with said hanger to drop the rackbar into engagement with the pinion, substantiall y as set forth.

3. The combination, with a drivingshaft having a pinion thereon, said shaft having a cl uteh connected therewith, a hanger, a rackbar loosely suspended therefrom, and unclutehing devices adapted to be operated by said bar, of a depending trip composed of two integral arms, one to receive the hanger and the other, when depressed by the passage of a knot therein, to disengage the hanger from the bar, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

WASHINGTON I'I. KILBOURN.

Witnesses:

Ennns'r KRUSE, F. G. BENEDICT. 

